ppapi/cpp/var_array_buffer.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ppapi/cpp/var_array_buffer.h"
   6
   7 #include <limits>
   8
   9 #include "ppapi/c/ppb_var_array_buffer.h"
  10 #include "ppapi/cpp/logging.h"
  11 #include "ppapi/cpp/module_impl.h"
  12
  13 namespace pp {
  14
  15 namespace {
  16
  17 template <> const char* interface_name<PPB_VarArrayBuffer_1_0>() {
  18   return PPB_VAR_ARRAY_BUFFER_INTERFACE_1_0;
  19 }
  20
  21 }  // namespace
  22
  23 VarArrayBuffer::VarArrayBuffer() {
  24   ConstructWithSize(0);
  25 }
  26
  27 VarArrayBuffer::VarArrayBuffer(const Var& var) : Var(var) {
  28   if (!var.is_array_buffer()) {
  29     PP_NOTREACHED();
  30     var_ = PP_MakeNull();
  31   }
  32 }
  33
  34 VarArrayBuffer::VarArrayBuffer(uint32_t size_in_bytes) {
  35   ConstructWithSize(size_in_bytes);
  36 }
  37
  38 pp::VarArrayBuffer& VarArrayBuffer::operator=(const VarArrayBuffer& other) {
  39   Var::operator=(other);
  40   return *this;
  41 }
  42
  43 pp::Var& VarArrayBuffer::operator=(const Var& other) {
  44   if (other.is_array_buffer()) {
  45     return Var::operator=(other);
  46   } else {
  47     PP_NOTREACHED();
  48     return *this;
  49   }
  50 }
  51
  52 uint32_t VarArrayBuffer::ByteLength() const {
  53   uint32_t byte_length = std::numeric_limits<uint32_t>::max();
  54   if (is_array_buffer() && has_interface<PPB_VarArrayBuffer_1_0>())
  55     get_interface<PPB_VarArrayBuffer_1_0>()->ByteLength(var_, &byte_length);
  56   else
  57     PP_NOTREACHED();
  58   return byte_length;
  59 }
  60
  61 void* VarArrayBuffer::Map() {
  62   if (is_array_buffer() && has_interface<PPB_VarArrayBuffer_1_0>())
  63     return get_interface<PPB_VarArrayBuffer_1_0>()->Map(var_);
  64   PP_NOTREACHED();
  65   return NULL;
  66 }
  67
  68 void VarArrayBuffer::Unmap() {
  69   if (is_array_buffer() && has_interface<PPB_VarArrayBuffer_1_0>())
  70     get_interface<PPB_VarArrayBuffer_1_0>()->Unmap(var_);
  71   else
  72     PP_NOTREACHED();
  73 }
  74
  75
  76 void VarArrayBuffer::ConstructWithSize(uint32_t size_in_bytes) {
  77   PP_DCHECK(is_undefined());
  78
  79   if (has_interface<PPB_VarArrayBuffer_1_0>()) {
  80     var_ = get_interface<PPB_VarArrayBuffer_1_0>()->Create(size_in_bytes);
  81   } else {
  82     PP_NOTREACHED();
  83     var_ = PP_MakeNull();
  84   }
  85   is_managed_ = true;
  86 }
  87
  88 }  // namespace pp